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The purpose of this research was to know existence and status of Vesicular Arbuskular Mycorrhiza at some crop in chalky ground. This research has been done at Ria-ria Village, Sipoholon District, Tapanuli Utara Region and Soil Biology Laboratorium of Agriculture Faculty of North Sumatera University. This research was using soil separating method to searched spore and root coloring method to find out root colonization. The result of this research are 12 type of spore. Highest spore there at seagegrass crop (42) and lowest at vegetable crop (22). The spore to be dominated by Glomus. The percentage colonization of observed was between 58,654 - 85,19 %